#include <regex>
#include <string>

template <typename T>
std::string regexCode(T code){
	switch(code){
	case std::regex_constants::error_collcate:
		return "error_collate: "
			   "regex has invalid collating element name";
	case std::regex_constants::error_ctype:
		return "error_ctype: "
			   "regex has invalid character class name";
	case std::regex_constants::error_escapte:
		return "error_ctype: "
				"regex has invalid escaped char. or trailing escape";
	case std::regex_constants::error_backref:
		return "error_backref: "
			   "regex has invalid back reference";
	case std::regex_constants::error_brack:
		return "error_brack: "
			   "regex has mismatched '[' and ']'";
	case std::regex_constants::error_paren:
		return "error_paren: "
			   "regex has mismatched '(' and ')'";
	case std::regex_constants::error_badbrace:
		return "error_badbrace:	"
			   "regex has invalid range in {} expression";
	case std::regex_constants::error_range:
		return "error_range: "
			   "regex has invalid character range, such as '[b-a]'";
	case std::regex_constants::error_space:
		return "error_sapce: "
			   "insufficient memory to convert regex into finite state";
	case std::regex_constants::error_badrepeat:
		return "error_badrepeat: "
			   "one of *?+{ not preceded by valid regex";
	case std::regex_constants::error_complexity:
		return "error_complexity: "
			   "complexity of match against regex over pre-set level";
	case std::regex_constants::error_stack:
		return "error_stack: "
			   "insufficient memory to determine regex match";
	}
	return "unknown/non-standard regex error code";
}






















